pH up and flower nutes. Runoff is 5.9 It’s been 6.0 to 5.9 with no issues until now. I did wait a little too long (maybe on day to feed/water. Usually do it every 3 or 4 days. Waited until top of the 4th day. Soil was dry. What is causing this yellowing??? [image] [image]

Nutrient burn is correct answer it doesn’t always present with just tips and edges [image] Nutrient burn in marijuana plants Nutrient burn in marijuana plants Est. reading time: 6 minutes potassium also looks quite similar [image] Potassiu…

Right on thank you i just learned something new very helpful as always

@Donaldj . you keep this up ill be out of a job…lol great answer perfect my friend. Will

lol just because I took 5 months off doesn’t mean I got rusty on my research still read threads and watched just didn’t feel right chiming in when my gear was all in storage now I’m back at it and have free time :wink:

since you are in flower you might want to consider getting your Ph up around 6.3 to 6.8 low is okay during veg because the nutes it needs then are accessible at lower PH…but the nutes you need in flower are better accessed at higher Ph

that answer will vary depending on a variety of factors… if it were mine I would have a bit of patience and not try to get it all the way up at once unless you are doing a complete flush.

That makes sense. I’ll slowly work up.

Thank you everyone for helping out! As soon as I read the responses I gave her pH up only water. 1-1/2 gallons (using 3 gallon pot). The runoff was starting to clear up at the end. I’ll keep following directions listed above and hope it doesn’t get too much worse before it gets better.

@Jpositive , it looks like a lite is to close ,second pict down lite is very close and iam seeing down turned leaves next to the bulb . even cfl’s can do this . ph doesn’t normally cause this look . Hammer .

Help! yellow coloring of leaves 27 days into flower

Grow Cycle

Jpositive November 22, 2016, 2:59pm 10

Ok…so I am putting pH up in my RO water, get it around 10.6 which brings me to 5.9 or 6.0 runoff.
How high should I bring my water to get 6.8 runoff? (thanks for your patience in advance)

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Help! yellow coloring of leaves 27 days into flower

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